561236 - push_back() causes dependency on libstdc++ from gcc4.5

Status: RESOLVED WONTFIX

(Core :: IPC, defect)

Description

[(dormant account)]

Attachment: crappy workaround

(list|vector)::push_back can't be used if we dynamically link libstdc++

Comment 1

[(dormant account)]

We should move to gcc4.5 to make use of PGO and (eventually plugins), unfortunately 4.5 will accidentally drag in dependencies on newer stdc++. Luckily only a handful of places in the code used push_back(or list::insert).

Comment 2

[(dormant account)]

Looks like the problem is http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16896 

Looks like so far the backward-compat of our Linux binaries was mostly due to luck. libstdc++ does not guarantee backward compatibility(just forward).

I have had luck with compiling using a libstdc++ from gcc 4.4. Trying to see if i can compile gcc 4.5 with stdc++ from 4.4.

Comment 3

[(dormant account)]

Attachment: gcc 4.5 patch

This patch is the best option for making backward-compatible binaries with 4.5. Modifying code to avoid stl lists sucks. There are a couple more library calls, but i'd rather keep the changes small for now.

Comment 4

[(dormant account)]

-static-libstdc++ seems like a reasonable workaround